Vat dye.



ITED STATES PATENT 'tDFFItJJEO JOSEPH DEINET, OF ELBERFELD, GERMANY,ASSIGNOR T0 FARBENFABRIKEN VORM. FRIEDR. BAYER & 00., OF ELBERFELD,GERMANY, A CORPORATION OF GEBMEtNY.

VAT DYE.

Specification of Letters Patent.

Patented m No Drawing. Application filed May 15, 1909, Serial No.496,110, Renewed March 18, 1910. Serial No. 550,293

To all whom it may concern:

Be it known that I, JOSEPH Dn-mn'if, citizen of the German Empire,residing at Elberfeld, Germany, have invented new and usefulImprovements in Vat Dyes, of which the following is a specification.

My invention relates to the production of a new anthracene derivative.It is obtained by converting the l-aminol-oxyanthraquinone into itsmonobenzoylated derivative. The reaction is carried out by treating the1 amino 4 oxyanthraquinone with benzoyl chlorid.

Example: 10 parts of 1-amino-4-oxyan thraquinone are heated to boilingfor about half an hour with 100 parts of mtrobenzene and parts ofbenzoyl chlorid. The new condensation product crystallizes from thecooling liquid in the shape of bronze-red shining leaflets which arefiltered ofi and dried. It is soluble in pyridin with a ellowred color,in concentrated sulfuric aid with a red color. By treatment withhydrosulfite and NaOH at yellow-red. vat is obtained which dyes cotton,wool or silk bluislrred red vat with hydrosulfite and caustic soda lye,which vat dyes the textile fiber bluish-. red shades, substantially 'asdescribed.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

JOSEPH DEINET. [1,. s.] Witnesses: Orro Komo, C. J. WRIGHT.

